Finding the Fourth Proportional to 1,426.16, 1,968.08 and 1,001.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.16 : 1,968.08 = 1,001.40 : x
2. Step 2: Convert to fraction form
   1,426.16/1,968.08 = 1,001.40/x
3. Step 3: Cross multiply
   1,426.16x = 1,968.08 × 1,001.40
4. Step 4: Simplify right side
   1,426.16x = 1,970,835.31
5. Step 5: Solve for x
   x = 1,970,835.31/1,426.16
6. Step 6: Final answer
   x = 1,381.92